Epson CW3S16 Operation Manual page 183

Media Analysis Test
Note
This test is not valid for a SCSI drive.
The Media Analysis Test performs a series of tests to locate bad
patches. Even though you may have a list of bad patches from
the manufacturer, this will not list any new bad patches which
may have developed as a result of aging or poor handling. This
test locates all bad tracks on the hard disk and lists them in the
Bad Track List box. Since this test writes from all cylinders and
heads on the hard disk to verify any bad tracks, this test may
require several minutes to complete. For best results, run this
test to its entirety.
Advanced ROM Diagnostics
E-20